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发明名称
Système de transmissions télégraphique et téléphonique simultanées ou séparées
摘要
申请公布号
FR978533(A)
申请公布日期
1951.04.16
申请号
FRD978533
申请日期
1942.12.18
申请人
发明人
SUEUR RENE
分类号
H04M7/08;H04M11/06
主分类号
H04M7/08
代理机构
代理人
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